Rotary engine



M. MURAKAMI v une :29; 1937,

ROTARY ENGmE `Filed om. 14, 1955 HHH I llLU Patented June 29,

- UNlTEDSTAT-ES PAT ENIT OFFICE I I `2,055,565 y h "ROTARY ENGINE Masasukel Murakami, TokyoQJapan Appui-,aum octber 14, 1935, serais.14,936.` u cInJapan- July 24, 1935 p claimsz.` (ci. 12s-11) LMy* invention relates to rotary engines of cooperativelyrotating disc type-and more particularly toimprovements in the device for circulat- `ing"cooling'water through the cylinder'and other `5 essential working parts, and has forjitsobject `to facilitate the easy manufacture of theV engine by Y simplifying the construction `and to xeffect autof matic water circulation through 'essential work` `ing parts `without using "an independent cooling l0 waterpumpg Y I i l What I consid-arto benovela'ndmy invention will be better understood by the following description=and appended claims when consideredln connection with the accompanying drawing; In

thedrawing, Fig. llis a diagrammaticview ofa simplest rotary engine Vto which `the present in- `gram for illustratingthe principle of operation dfytheengine shown in Fig. `1;"Fig. 3 is a cross sectional view` of an internalcombustionenglne embodying "this invention, y the `view being taken on line 3`3 of Fig.`4;` Fig. 4 is a longitudinal l sectional view takenvonline 4--4 ofFig. 3; Fig. 5

is a horizontal section taken on line5-5 of Fig.`3;

l and Fig.` 6 is a. perspectiveview of the rotor. l

I l. l concentricshafts 3'and 34 respectively are arp ranged to hermeticallyft in and rotate within a working cylinder I." The shafts 3 and 3 are .h coupled respectively to a commonside `shaft -or h mainfshaft `6 by means of special transmission gears 4,"5 and 4*,"5' consisting of anlellipse-like configuration set `at the phase difference of90\ other `at therelation settled` by the speed ratio of the transmission gears 4; 5 andl",` 5',landto rotate the main shaft with uniform revolving speed;` Suchrotary engineshave been known to the art. JSince` such'rotary engine requires no p crank, connecting rodand valve devices which `are necessary in-anordinary reciprocating en-` I gine, `irtgives a. very compact construction devel- 4:5` oping a greater power with? a-smaller size. VOn the `otlfierhand, however, such engine `should effect I delicate operationandheavy duty in a very lirnited space. In orderto obtain smooth operation the `over-heating of thecylinderfand rotors as s Well as other working parts. j" The present inven- .h tion isintended to obtains. perfectlycooled-engine of the above mentioned type. `For this purpose in accordance with this invention an end Referring to" Figs'. 1 and 2; the cooperating re-f"` volving discs or rotors 2` and 2 securedto the@ .h h outwardly as shown l in 3; for transmitting continuously varyingvcyclic mo` I tion vsothat the rotors may cooperate with each l of the engine itis absolutely necessary to prevent 5g; cover is fixed to each end ofthe cylinder form-- `using` a separate pumpto cool essential working parts effectively.; l l

'I'he presentinventio'n is explained more com-` pletely by .referring to Figs. 3 and 4. I represents the cylinder having a water jacket 1. An inlet pipe 8 for working; fluid and an exhaust pipe-,9 are attached to the cylinder. Il) and Ill'` `are the 10 end covers secured to theouter periphery of the cylinder-I at 'its opposite-h. ends so as to form' a I water tank or reservoircommunicating with the cylinder jacket` 1., A `water inlet pipe I`I and the outletY pipe II' are connected tofthecylinder cov- 15 ers IU and I0' respectively. 2 and 2 represent the rotorssecured to the shafts 3` and 3',irespective 1y. The rotors 2 and2 are provided with circular end plates I2 and I2 respectively, at opposite ends. Flanges I3 andrIS' project from theend plates lI2; lf2 to hermetically t in the cylinder I.' "The shafts 3 andl3' "are keyed at 3'? to the yrtitcrsrl` 'and 2' respectively and fit hermetica-lly witheach other and can rotate independently at a deflnitemelation settledlby the transmission gear- 25 ing, "The inside of the flangeportions I3 and I3 `istapered outwardly forlfacilitating the circulashown in Fig." 5f, a guide piece I5 of triangular 35` section maybe Aprovidedlin" the hollow' pistons of each rotor anda cooperating `projection I6 formed out of the end covers` I0 `and` Ill respectively facing the guide .piece I5 for improving the circulationlof-cooling water-into the pistonsof the ro'- 40 tors due to the centrifugal force. I1 represents a water tight packing for the shafts 3 and 3', I8 a roller thrust bearing and I9 itsv cover.l When a plurality of cylinders `I `are arranged aroundthe main shaft 6 all of the `end covers III and I0' are 45 respectively preferable to be made of one unit common to all of the cylinders.`

The present rotary engine constructed as above described 'canbe operated by feeding fuel 'from AVthe inlet pipe Il?` andv causingcombustion of the fuel in the space between the hollow pistons `of at a definite continuously varying cyclic speed.

The cooling water `entering into the cylinderssl end through the pipe II is `circulated into the rhollow pistons of the rotors and also passed through the cylinder jacket due to the centrifugal force produced bythe rotation of the rotors and i the convection ofrheat and then flows out of the I ing pump.

` the outer openings I4 bycentrifugal force when Referring speciiicallyvto Figs: 3 and 4, it Wilibeobservedvthat cooling water enters into the.

end cover space from the. pipe II `and isdistributed-to therinner openings I4 and flows into the hollow space ofpistonsiwand flows outof the pistons rotate, and then` the water ilows into `the jacket chamber 1 and is taken out through the pipe II. .Ati this time a similar inlet pipe (not shown) arranged at the opposite end of thev .cylinder I will introduce; cooling lwater-into the openings yIl' of .the pistons. 2b andthis water will also be discharged by centrifugal force from thetpistons 2binto the water jacket Vchamber 1 and dischargedl through the. discharge outlet I If.

The `fuel or working fluid is supplied to the engine through the fuel inlet pipe, 8` intothe cylinder space `between two rpistons 2a, 2b, shown by dotted lines in Fig. .4, and the fuel vis then compressed when these twov pistons ro-tate at different relative speeds, `and is Vignited by the spark plug 20. 44'I'hen theexplosionfand expansion-take place to force apart these twopistons, thereby rotatingthe rotors 2, 2 andV transmitting the .i power to. the side shaft.,-6 through `the ellipse- `'like gearingsl, y."5 and. l. 5'... c o

. The present engine has a comparatively simple construction vconsisting .of almost symmetri- 'cal parts Vand can be easily manufactured.

Having thus fully described theV invention what is claimedas newy and `desired 'to be securedl by LettersPatent is: v

1.,An engine of the character described,zcomprising a stationary casing :having'a'cylindrical bore., rotor members rotatably mounted in said bore, each of said members having an endfplate attone end thereof, eachrotor-membefr, also havingr-a plurality of spaced hollow pistons projectingyfrom said end plates into said cylindrical bore,

' y the-outer end of each piston being closed, said end ,"plates having openings-ingalignmentwith the hollow pistons, awater jacketin4 the:.casing surrounding the cylindrical bore,mea ns for feeding cooling fiuidto said water jacket, andmeans lf placing said water jacketr in communication with i the'fopenings in saidv end` plates.

.2.; An engine of thecharacter'described, comprisingl a stationary casing having a cylindrical vbore.a pair of rotor members rotatably mounted in said bore, each `of said; members having anl end 'plate at one end'thereof; vsaid plates being positionedat the opposite `ends-.of the bore, each rotor member also havinga plurality of'hollow pistons projecting toward the end plate of the opposite rotor member, said end plates having openings in substantiel alignment with said hollowV pistons, a water jacket in the casing surrounding the cylindrical bore, means for feeding a cooling fluid to said water jacket, and means placing said water jacket in communication with the openings in said end plates.

3. nnengine of the character described, comprising a stationary casing-having a cylindrical bore, a pair of rotor members rotatably mounted in the bore, each of said members having an end plate at one end thereof, eachrotorv mem- ;:ber also having a plurality of spaced hollowy pistons projecting from said end plates, and adapted to extend'into the cylindrical bore, said end plates having openings in substantial alignment with the hollow pistons, a partition arranged in each piston to cause cooling fluid entering a piston to travel in a circuitous path, means for feeding a cooling-fluid to the openings in said end plates, a Water jacket -in the casing surrounding the' cylindrical bore, and v means placing said water jacket in communication with the openings in'lthe end plates.A

4.- An engine of the character described, comprising, a stationarycasing havinga cylindrical bore, a pairof rotor members rotatably mounted in the bore, eachy of said members having an end plate, said vend plates being positioned at oppositelends of the bore, each member also having a plurality of hollow pistons projecting toward the end plate, of theopposite member, each end plate having an intake `port and an outlet port for each piston, a partition arranged in each piston to cause cooling fluid entering a piston to travel from the inlet port to the outlet port thereof. means forV feeding a cooling fluid to the inlet ports, a Awater jacketin the casing surrounding the cylindrical bore, and means placing said water jacket in communication with some of said ports.4

5.1'An engine of the Vcharacter described, comprising a .stationary casing having a cylindrical bore, end covers secured to said casing, a pair of rotonmembers rotatably mountedin the bore, each of `said members having a disc at one end thereof, said discs being positioned at the opposite ends of the bore and spacedfrom the end Acovers'of the, casing to form a water tank between said "end covers and said discs, each rotor memberv also having a plurality of hollow pistons projecting toward the disc of the opposite 'member, each disc having an intake port and an outlet port for ,each piston, said ports being in comrnunicatony with vthejwater tank, a partition arranged in each piston to cause cooling fluid entering a. piston to travel from the inlet port to the outlet port thereof, a Water jacket in the casingsurrounding the bore, meansplacing said water jacket in communication with said water tank,.means for feeding acooling fluid to said water tank, andvmeans forV discharging said fluid from said waterA tank. 1

- MASASUKE MURAKAMI. l 

